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The 23-lb cylinder is at rest on the horizontal surface when a tension P =17 lb is applied to the end
of the cable which is wrapped securely around it, and the cylinder rolls without slipping on the
surface. The radius of the cylinder is 2 ft and its moment of inertia about its mass center O is 9 lb-ft-
sec?. Determine the magnitude of the friction force acting on the cylinder. Give your answer in Ib.

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